package cn.z2huo.knowledge.basic.accessmodifier.pack.pack1;

class Dog {

    Dog() {
        System.out.println("this is a dog");
    }

    void run() {
        System.out.println("狗是用四条腿跑步的");
    }

    public static void main(String[] args) {
        Cat cat = new Cat();
    }
}
